BD87B34FVM-CTR

Overview

The BD87B34FVM-CTR is an automotive voltage detector IC featuring integrated reset and watchdog timer (WDT) functions. It monitors microcontroller input voltage and clock signals to enhance system redundancy. The device supports a wide input voltage range up to 20V with low static current consumption of 4.5µA (ON) and 3µA (OFF). The typical under-voltage detection voltage is 3.4V with ±2.0% precision. It utilizes an open-drain output active low, operates from -40°C to 125°C, and is housed in an MSOP8 package.

Feature Summary

• Integrates voltage monitoring reset and watchdog timer for microcontroller supervision
• Maintains low static current across a wide 20V input voltage range
• Allows adjustable reset delay and watchdog monitoring times via external capacitors
• Supports selectable fixed or variable reset detection voltages using external resistors

Applications

• Automotive microcontroller power supply monitoring
• System redundancy enhancement in vehicle electronics
• Watchdog timer implementation for embedded systems

Procurement Notes

Verify the specific suffix and packaging configuration against the manufacturer's latest documentation to ensure compatibility with automated assembly processes. Confirm that the component meets the required AEC-Q100 Grade 1 standards for your specific automotive application environment. Cross-reference the functional safety classification to ensure it aligns with your system's safety integrity level requirements before finalizing procurement.

Selection Notes

Select this component when designing automotive systems requiring robust microcontroller supervision with low power consumption. It is suitable for applications needing a wide operating voltage range up to 20V. Consider the adjustable timing features if precise control over reset delays and watchdog intervals is necessary. Ensure the MSOP8 package fits your board layout constraints and thermal management requirements.

Part Context

This part belongs to Rohm Semiconductor's family of automotive voltage detectors designed for functional safety support. It shares architectural similarities with other models in the series, such as the BD87B46FVM-CTR and BD87B34G-C, differing primarily in detection voltage thresholds and package types. These components are engineered to meet stringent automotive reliability standards while providing essential system protection functions.

Replacement Considerations

The BD87B34G-C serves as a pin-compatible alternative in an SSOP6 package with similar electrical characteristics. Verify that the package dimension change does not impact your PCB footprint and that the specific detection voltage threshold remains appropriate for your circuit design requirements.